Inorganic nitrogen, phosphorus and potassium content of natural fertilizers for use in organic agriculture. TERRA LATINOAMERICANA, [S. l.], v. 37, n. 4, p. 371–378, 2019. DOI: 10.28940/terra.v37i4.520. Disponível em: https://terralatinoamericana.org.mx/index.php/terra/article/view/520. Acesso em: 13 jun. 2026.